Overload Protection
The instrument is safeguarded for up to 1000 V in
all measuring functions by overload protection. Voltages of greater
than 1000 V and current of greater than 10 or 16 A are indicated
acoustically.
Dangerous contact voltages are indicated when the 1 kHz low pass
filter is activated.
The FUSE display appears in order to indicate that the fuse for the
current measuring input has blown.
RMS Value with Distorted Waveshape
The utilized measuring method allows a waveshape
independent RMS measurement (TRMS AC and AC+DC) for voltage and
current (METRAHIT EXTRA up to 20 kHz).
Selectable Filter for V AC Measurement
A 1 kHz low-pass filter can be selected if required,
for example to measure the motor voltage at electronic frequency
converters. The input signal is checked by a voltage comparator for
dangerous voltages as long as the low-pass filter is activated. A
high-voltage symbol appears at the display if
dangerous voltage is present.
Measuring 5 V Square-Wave Signals
This function allows to test circuits and
transmission cables by measuring the frequency and the duty cycle of
pulses with amplitudes of 2 to 5 V and frequencies of 100 Hz to 1
MHz.
Analog Scale for Quick Trend Display – Bar Graph or Pointer The
analog scale (with additional negative range for zero frequency
quantities) allows for faster recognition of measured value
fluctuation than is possible with a digital display.
The instrument can be switched back and forth between bar graph and
pointer display via the menu.
Automatic Storage of Measured Values *
The DATA function automatically saves the digitally
displayed measured value after stabilization in. Acoustic signaling
is also used to indicate whether the new measured value deviates
from the initial reference value by less or more than 0.1% of the
measuring range.
* Patented
